Shaving device



Jan. 28, 1941. N. HOLSCLAW SHAVING DEVICE Filed May '7, 1937 Patented Jan. 28, 1941 SHAVING DEVICE Neil Holsclaw, Chicago, Ill., assignor, by mesne assignments, to American Safety Razor Corporation, Brooklyn, N. Y., a corporation oi. Virginia Application May 7, 1937, Serial No. 141,259

4 Claims.

This invention relates to razors of the rotary type; and the main objects of the invention are to provide for a more positive and effective interfitting and cutting adjustment of the shear mem- 5 bers; to provide for continuous automatic adjustment of the cutting and shear members; to

provide such means adapted to compensate for wear; to provide for ready assemblage and renewal of parts; to provide a razor of this kind of simple design and few parts and adapted for ready manufacture and maintenance at small cost; and to provide such a razor adapted for dry operation and without lather. I This invention is illustrated by the accompanying drawing in which:

Figure l is a perspective view of a preferred embodiment of my razor, showing its cutting side. Fig. 2 is an enlarged face view of the cutting head of the razor. t l Fig. 3 is mainly a longitudinal axial section on the line 3 3 of Fig. 1 through the razor head with the rotor and driving gear in elevation.

Fig. 4 is a cross-section through the head on the line 4-4 of Fig. 3, the cutting shear feature being at the right and the exit for beard cuttings being at the left.

Fig. 5 is a section through the right end of the head of Fig. 3 on the line 5-5.

Fig. 6 is an enlarged section through the left end of the head of Fig. 3 on the line 6--6.

' Fig. '7 is a perspective view of one of the two end journal bearing blocks for the rotor, such as shown in position on Fig. 6.

Fig, d is a fragmentary section on the line d-B of Fig. 3 and shows mainly how the head gear shaft shown in Fig. 3 is held in place.

Fig. 9 is a rear elevation of the razor head and cutter plate as viewed from the left of Fig. d.

Referring more in detail to these views, the to razor as a whole comprises a combination handle and motor housing I on one end of which is a removable housing head 2 containing a shear ro-' tor t.

A two-conductor electric power cord dis conit nected to the opposite end of housing i, as shown in Fig. l. A manual device 5 controls starting oi the motor as will be understood through the latter, mounted in chamber 6 and connected to shaft i, is not actually shown. But for present W purposes this shaft 1, jointed at I, may be regarded as the motorizing power source.

The generally cylindriform hollow frame or head 2 is laterally apertured longitudinally as at d on Figs. 2 and 4, On one edge of this narrow W slot or beard receiving aperture 8 is a fixed blade or cutter 9. Along the opposite edge isa series of tapered guard fingers I0 pointing toward said blade and positioned to hold the skin of the person being shaved from bearing against the cutting edge of the blade, but permitting the beard to be 6 so engaged.

In use said blade is mechanically integral with the head casting, but actually the blade member 9 is removably hinged at II and secured by screws at l2 for ready access to chamber i3 and for blade 10 renewal when necessitated by cutting edge wear. This member 9 is cylindroarcuate and occupies labout l80degrees on the head 2, as shown by Figs. 4 and 5.

' The rotor 3 is journaled at its ends on the end w walls 2 of head 2, as at l6-l6 on Figs. 3 to 6. The bearing pivots ll of the rotor flt somewhat loosely in the wall cups It, but the rotor is resiliently held snugly against the cutter side of head 2 by the spring and block mechanism shown by 2d Fig. 6 and now to be described. Here the bearing walls 2' have slots 2i and 22 extending outward from the cups It at about 90 degrees from each other. Each slot 2i lies about midway of the cutting and hinge edges of blade 9 and when the w blade is swung open access may be had to rotor 3 for its removal or replacement by sliding of the rotor pivots H in head slots 2 i.

Each slot 22 extends outwardly part way toward a corresponding hinge pivot ill, about 90 degrees W from the plane of slots 2i, but terminates in a seat 2% containing a screw 28 which extends outwardly in a threaded hole ill for adjusting the inward thrust of the corresponding bearing bloclt 29 against the rotor pivot ii, In order to assure dd uniform and constant pressure of the spiral shear ribs 3! of rotor 3 against the cutting edge of blade d, I interpose an inwardly concave leaf spring between the screw it and bloclr ii, the latter being notched at 3d--3d on its outward corners dill to receive the ends of spring dd, as in Figs. ii and TI, and the middle part of spring being seated against the inner end of screw it. Bloch iii remains mainly in its guide slot 22.

The ribs it are rectangular in cross section and db the leading square-cornered shear edge ti forces the hairs against the edge of blade d.

The rotor i is operatively connected to the power supply shaft i by means of the coacting bevel gears M and 42 fixed on shafts i and 43 60 respectively, and spur gears 44 fixed on the ends of shaft 43 where they coast with the toothed gear ends 45 of the rotor 3. The shaft 43 is held in place by a journal block cover strip 41 secured by screws 48. The rotation of shear 55 member 3, indicated by arrow 49, is counterclockwise as viewed in Fig. 4 and is at a rather high speed.

In order to enable continuous operation of the razor without clogging or any special attention the semicylindrical blade member 9 is provided with a series of openings 50, as shown on Fig. 9, for the escape of beard cuttings.

In use the razor is connected to a room lighting circuit and the motor set going by means 5. Then the user grasps the handle part i and draws the cutter face of head 2 (upper right-hand part on Fig. 4) over the surface to be shaved, preferably against the grain."

It is to be understood that some of the details set forth may be altered or omitted without departing from the spirit of the invention as defined by the following claims.

I claim:

1. A razor head cylindrically apertured with a spiral shear rotor therein, said head having end walls each provided with a pair of radial. slots, one to loosely receive an axial end bearing of said rotor and the other to house an adjustable inward spring thrust member which is provided to bear against the proximate rotor bearing and to assure constant shear contactual pressure relation between the rotor and a blade which is carried by said head on its side opposite from the thrust members.

2. In a razor device of the class described, a spirally ribbed shear rotor having a bearing pivot, in combination with a housing including a head having a slot toloosely receive said pivot and also an intersecting slot having therein a spring-supported arcuate faced thrust block to laterally embrace said pivot and retain it in place in the first said slot and to hold said rotor resiliently in its efiective shaving position.

3. A motorized razor comprising a hollow head having a rigidly mounted arcuately shaped cutter blade in combination with a resiliently mounted rotor having mutually spacedspiral arcuately shaped shear ribs to engage said cutter blade, the inner face oi the cutter blade being concentric with the outer face surface of said ribs and of like radius, said head havingend walls each provided with a pair of radial slots, one to loosely receive an axial end bearing of said rotor and the other to house an adjustable inward spring thrust member which is provided to bear against the proximate rotor bearing and to assure constant shear contactual pressure relation between the rotor and a blade which is carried by said head on its side opposite from the thrust members.

4. In a dry shaver, a casing, a bore in said casing, said casing having end walls, a longitudinal slot in said casing provided with a shearing edge, a rotary cutter of a diameter slightly less than that of the bore mounted for rotation within said bore, a trunnion on each end of said cutter, a diametrical groove in each end Wall of the casing directed toward the said shearing edge, a bearing pivot adapted to bear against one side of each trunnion so as to press it toward said shearing edge, said bearing pivot being mounted for sliding movement within said groove, and means for urging said pivots toward said shearing edge, whereby said cutter will be urged against the wall portions of the bore adjacent to said shearing edge, and a groove transversely intersecting said first groove and opening outward and adapted to slidably receive said trunnions, whereby the cutter may be inserted into or removed from its seat Within said casing, and a side portion of said casing being removable to permit the cutter to pass through the opening formed by removing said side portion.

NEIL HOLSCLAW. 

